Adscititious \Ad`sci*ti"tious\, a. [L. adscitus, p. p. of adsciscere, asciscere, to take knowingly; ad + sciscere to seek to know, approve, scire to know.] Supplemental; additional; adventitious; ascititious. "Adscititious evidence." --Bowring. -- {Ad`sci*ti"tious*ly}, adv. [1913 Webster]